/* ==========================================================================
   TNT Cloud - Holographic Iridescent Spectrum Design System
   Visual Inspiration: Image 1 (Holographic Iridescent spectrum layers) & Image 2
   ========================================================================== */

:root {
  --bg-primary: #0b0816;
  --bg-secondary: #120c24;
  --bg-card: rgba(22, 16, 44, 0.72);
  --bg-card-hover: rgba(30, 22, 60, 0.85);
  --border-glass: rgba(255, 255, 255, 0.12);
  --border-focus: rgba(168, 85, 247, 0.45);
  
  /* Holographic Iridescent Spectrum Palette */
  --holo-magenta: #ec4899;
  --holo-violet: #8b5cf6;
  --holo-cyan: #06b6d4;
  --holo-teal: #10b981;
  --holo-yellow: #eab308;
  
  --gradient-holo: linear-gradient(90deg, #ec4899 0%, #8b5cf6 30%, #06b6d4 65%, #10b981 85%, #eab308 100%);
  --gradient-purple-cyan: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 50%, #ec4899 100%);
  --gradient-btn: linear-gradient(135deg, #06b6d4 0%, #8b5cf6 100%);
  --gradient-btn-hover: linear-gradient(135deg, #38bdf8 0%, #a855f7 100%);

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  --glow-shadow: 0 0 35px rgba(139, 92, 246, 0.28);
  --card-shadow: 0 16px 40px -10px rgba(0, 0, 0, 0.6);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 50% 0%, #2e155b 0%, transparent 55%),
    radial-gradient(circle at 85% 30%, #1e1140 0%, transparent 45%),
    radial-gradient(circle at 15% 70%, #170d36 0%, transparent 40%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Background Dynamic Canvas & Ambient Glows */
#holographicCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 0;
  opacity: 0.65;
}

.ambient-light {
  position: fixed;
  width: 450px;
  height: 450px;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
  opacity: 0.25;
  animation: floatLight 12s ease-in-out infinite alternate;
}
.ambient-light-1 {
  top: 10%;
  right: -5%;
  background: var(--holo-violet);
}
.ambient-light-2 {
  top: 55%;
  left: -8%;
  background: var(--holo-cyan);
  animation-delay: -5s;
}

@keyframes floatLight {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 40px) scale(1.15); }
  100% { transform: translate(20px, -30px) scale(0.9); }
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Navigation Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 8, 22, 0.75);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  transition: all 0.3s ease;
}

.site-header.scrolled {
  background: rgba(11, 8, 22, 0.92);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-main);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.02em;
}

.logo-symbol {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, #06b6d4, #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
}

.logo-symbol svg {
  width: 22px;
  height: 22px;
  fill: #ffffff;
}

.brand-title span {
  background: var(--gradient-holo);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-menu {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 28px;
}

.nav-menu a {
  text-decoration: none;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.25s ease;
  position: relative;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: #ffffff;
}

.nav-menu a.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-holo);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  color: #ffffff;
  background: var(--gradient-btn);
  box-shadow: 0 4px 18px rgba(6, 182, 212, 0.35);
  transition: all 0.25s ease;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.55);
  background: var(--gradient-btn-hover);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: 6px;
}

/* Hero Section */
.hero-section {
  padding: 80px 0 60px;
  text-align: center;
  position: relative;
}

/* Holographic Pill Badge (Image 1 Style) */
.holo-pill-badge {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  background: rgba(30, 20, 60, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 18px;
  padding: 14px 28px;
  margin-bottom: 32px;
  backdrop-filter: blur(16px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4), 0 0 30px rgba(139, 92, 246, 0.25);
  position: relative;
  overflow: hidden;
}

.holo-pill-badge .pill-title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #ffffff;
  margin-bottom: 4px;
}

.holo-pill-badge .pill-subtitle {
  font-size: 13px;
  color: #cbd5e1;
  letter-spacing: 0.01em;
  margin-bottom: 10px;
}

.holo-spectrum-bar {
  width: 190px;
  height: 6px;
  border-radius: 999px;
  background: var(--gradient-holo);
  box-shadow: 0 0 14px rgba(6, 182, 212, 0.8), 0 0 10px rgba(236, 72, 153, 0.6);
  animation: spectrumGlow 3s ease-in-out infinite alternate;
}

@keyframes spectrumGlow {
  0% { filter: hue-rotate(0deg) brightness(1); }
  100% { filter: hue-rotate(45deg) brightness(1.25); }
}

.hero-title {
  font-size: clamp(32px, 5vw, 54px);
  font-weight: 800;
  line-height: 1.18;
  margin-bottom: 24px;
  letter-spacing: -0.025em;
}

.hero-title .gradient-text {
  background: var(--gradient-holo);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.hero-desc {
  max-width: 820px;
  margin: 0 auto 36px;
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1.8;
}

.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 980px;
  margin: 48px auto 0;
}

.stat-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  padding: 22px 18px;
  backdrop-filter: blur(12px);
  text-align: center;
  transition: all 0.3s ease;
}

.stat-item:hover {
  transform: translateY(-4px);
  border-color: rgba(139, 92, 246, 0.4);
  box-shadow: var(--glow-shadow);
}

.stat-value {
  font-size: 28px;
  font-weight: 800;
  background: var(--gradient-holo);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

/* Section Header Styling */
.section-header {
  text-align: center;
  max-width: 780px;
  margin: 0 auto 50px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--holo-cyan);
  background: rgba(6, 182, 212, 0.1);
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid rgba(6, 182, 212, 0.25);
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Features Grid */
.features-section {
  padding: 70px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 32px 28px;
  backdrop-filter: blur(14px);
  transition: all 0.35s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-holo);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-6px);
  background: var(--bg-card-hover);
  border-color: rgba(139, 92, 246, 0.45);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), var(--glow-shadow);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
  color: var(--holo-cyan);
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.7;
}

/* Pricing Grid (Referencing Image 2 & 10 Cards Requirement) */
.pricing-section {
  padding: 80px 0;
  position: relative;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin-bottom: 34px;
}

.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 24px;
  padding: 36px 30px;
  backdrop-filter: blur(18px);
  position: relative;
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
}

.pricing-card:hover {
  transform: translateY(-6px);
  border-color: rgba(139, 92, 246, 0.5);
  box-shadow: var(--glow-shadow);
}

/* Recommended / Featured Card (Image 2 PRO Card) */
.pricing-card.featured {
  border: 1.5px solid rgba(6, 182, 212, 0.65);
  background: rgba(26, 17, 54, 0.85);
  box-shadow: 0 0 35px rgba(6, 182, 212, 0.3), 0 0 50px rgba(139, 92, 246, 0.25);
  position: relative;
}

.featured-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #06b6d4, #8b5cf6);
  color: #ffffff;
  padding: 4px 18px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 12px rgba(6, 182, 212, 0.5);
}

.plan-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 20px;
}

.plan-name {
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
}

.plan-tag {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  text-transform: uppercase;
}

.plan-price-wrap {
  margin-bottom: 14px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.plan-currency {
  font-size: 22px;
  font-weight: 600;
  color: #ffffff;
}

.plan-price {
  font-size: 42px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1;
}

.plan-period {
  font-size: 14px;
  color: var(--text-muted);
}

.plan-desc {
  font-size: 13.5px;
  color: var(--text-muted);
  margin-bottom: 24px;
  min-height: 40px;
}

.plan-divider {
  height: 1px;
  background: var(--border-glass);
  margin-bottom: 24px;
}

.plan-features {
  list-style: none;
  margin-bottom: 30px;
  flex-grow: 1;
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: #e2e8f0;
  margin-bottom: 14px;
}

.plan-features li svg {
  width: 17px;
  height: 17px;
  fill: #10b981;
  flex-shrink: 0;
}

.plan-btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 12px 20px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.25s ease;
}

.plan-btn-outline {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  color: #ffffff;
}

.plan-btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.3);
}

.plan-btn-primary {
  background: var(--gradient-btn);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #ffffff;
  box-shadow: 0 4px 18px rgba(6, 182, 212, 0.4);
}

.plan-btn-primary:hover {
  background: var(--gradient-btn-hover);
  box-shadow: 0 8px 25px rgba(139, 92, 246, 0.6);
  transform: translateY(-2px);
}

/* Secondary Plans Grid (Cards 4-9) */
.plans-subgrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 32px;
}

/* 10th Card: Featured Dedicated VIP Card (As Requested: 新生成卡片放在模块第十位) */
.plan-card-tenth {
  background: linear-gradient(135deg, rgba(26, 18, 55, 0.95), rgba(15, 23, 42, 0.95));
  border: 1.5px solid transparent;
  background-clip: padding-box;
  border-radius: 24px;
  padding: 38px 34px;
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6), 0 0 40px rgba(236, 72, 153, 0.35);
  margin-top: 10px;
}

.plan-card-tenth::before {
  content: '';
  position: absolute;
  top: -2px; left: -2px; right: -2px; bottom: -2px;
  background: var(--gradient-holo);
  border-radius: 26px;
  z-index: -1;
  opacity: 0.85;
}

.tenth-badge {
  display: inline-block;
  background: linear-gradient(90deg, #ec4899, #8b5cf6, #06b6d4);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}

.tenth-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 30px;
  align-items: center;
}

/* Deep Technical Article Section */
.tech-article-section {
  padding: 80px 0;
}

.tech-article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 28px;
  padding: 56px 48px;
  backdrop-filter: blur(20px);
  box-shadow: var(--card-shadow);
  position: relative;
}

.tech-article-card::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 2px;
  background: var(--gradient-holo);
}

.article-header {
  margin-bottom: 38px;
}

.article-role-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(139, 92, 246, 0.15);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: #c084fc;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 18px;
}

.tech-article-body h2 {
  font-size: 24px;
  font-weight: 700;
  color: #ffffff;
  margin: 40px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.tech-article-body h3 {
  font-size: 19px;
  font-weight: 600;
  color: #e2e8f0;
  margin: 28px 0 12px;
}

.tech-article-body p {
  font-size: 15.5px;
  color: #cbd5e1;
  line-height: 1.85;
  margin-bottom: 20px;
}

/* Quantitative Parameter Comparison Table */
.tech-table-wrap {
  overflow-x: auto;
  margin: 32px 0;
  border-radius: 16px;
  border: 1px solid var(--border-glass);
  background: rgba(11, 8, 22, 0.6);
}

.tech-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.tech-table th {
  background: rgba(30, 22, 58, 0.85);
  color: #ffffff;
  padding: 16px 20px;
  font-weight: 600;
  border-bottom: 1px solid var(--border-glass);
}

.tech-table td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  color: #cbd5e1;
}

.tech-table tr:hover td {
  background: rgba(255, 255, 255, 0.03);
}

.tech-table .highlight-tnt {
  color: #38bdf8;
  font-weight: 600;
}

/* Code Blocks */
.code-block-wrap {
  margin: 28px 0;
  border-radius: 16px;
  background: #080512;
  border: 1px solid var(--border-glass);
  overflow: hidden;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.code-title {
  font-family: var(--font-mono);
  font-size: 13px;
  color: #94a3b8;
}

.btn-copy-code {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #cbd5e1;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-copy-code:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.code-content {
  padding: 20px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.65;
  color: #e2e8f0;
  overflow-x: auto;
  white-space: pre;
}

/* Articles Knowledge Base Section */
.articles-section {
  padding: 80px 0;
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}

.article-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 28px 24px;
  backdrop-filter: blur(14px);
  display: flex;
  flex-direction: column;
  transition: all 0.35s ease;
  position: relative;
  text-decoration: none;
  color: inherit;
}

.article-card:hover {
  transform: translateY(-6px);
  border-color: rgba(6, 182, 212, 0.5);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.5), 0 0 25px rgba(6, 182, 212, 0.2);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.article-tag-badge {
  background: rgba(139, 92, 246, 0.15);
  color: #c084fc;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.article-card-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
  margin-bottom: 12px;
  color: #ffffff;
  transition: color 0.2s ease;
}

.article-card:hover .article-card-title {
  color: var(--holo-cyan);
}

.article-card-excerpt {
  font-size: 13.5px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}

.article-footer-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-dim);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 14px;
}

.article-read-more {
  color: var(--holo-cyan);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* FAQ Accordion Section (40 Questions) */
.faq-section {
  padding: 80px 0;
}

.faq-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.faq-tab-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
}

.faq-tab-btn:hover,
.faq-tab-btn.active {
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.25), rgba(139, 92, 246, 0.25));
  border-color: rgba(6, 182, 212, 0.6);
  color: #ffffff;
  box-shadow: 0 0 20px rgba(6, 182, 212, 0.2);
}

.faq-container {
  max-width: 960px;
  margin: 0 auto;
}

.faq-group {
  display: none;
}

.faq-group.active {
  display: block;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 16px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-item:hover {
  border-color: rgba(139, 92, 246, 0.4);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 26px;
  background: transparent;
  border: none;
  color: #ffffff;
  font-size: 16px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  transition: background 0.2s ease;
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.02);
}

.faq-icon {
  width: 22px;
  height: 22px;
  transition: transform 0.3s ease;
  fill: var(--text-muted);
  flex-shrink: 0;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
  fill: var(--holo-cyan);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 26px;
  color: var(--text-muted);
  font-size: 14.5px;
  line-height: 1.8;
  background: rgba(11, 8, 22, 0.35);
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 16px 26px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Keywords Cloud Section */
.keywords-section {
  padding: 60px 0;
  text-align: center;
}

.tags-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  max-width: 1000px;
  margin: 0 auto;
}

.tag-pill {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-glass);
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.25s ease;
}

.tag-pill:hover {
  color: #ffffff;
  border-color: rgba(6, 182, 212, 0.5);
  background: rgba(6, 182, 212, 0.1);
  transform: translateY(-2px);
}

/* Footer */
.site-footer {
  background: #080512;
  border-top: 1px solid var(--border-glass);
  padding: 60px 0 30px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--holo-cyan);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-dim);
}

/* Standalone Article Layout Specifics */
.single-article-header {
  padding: 60px 0 30px;
  text-align: left;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--holo-cyan);
}

.article-stat-bar {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-muted);
  margin: 20px 0 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border-glass);
}

.article-content-container {
  display: grid;
  grid-template-columns: 2.8fr 1.2fr;
  gap: 40px;
  align-items: start;
}

.article-sidebar {
  position: sticky;
  top: 100px;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: 20px;
  padding: 28px;
  margin-bottom: 24px;
  backdrop-filter: blur(14px);
}

.sidebar-widget h4 {
  font-size: 16px;
  color: #fff;
  margin-bottom: 16px;
  font-weight: 700;
}

/* Responsive Media Queries */
@media (max-width: 1024px) {
  .features-grid,
  .pricing-grid,
  .plans-subgrid,
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .tenth-content {
    grid-template-columns: 1fr;
  }
  .article-content-container {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .nav-menu.mobile-active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: #0b0816;
    padding: 24px;
    border-bottom: 1px solid var(--border-glass);
    gap: 16px;
  }
  .menu-toggle {
    display: block;
  }
  .hero-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .features-grid,
  .pricing-grid,
  .plans-subgrid,
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .tech-article-card {
    padding: 32px 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}